Question

A wheel at rest is accelerated with uniform angular acceleration 4.6 rad/s2. How many revolutions does it take for the wheel to achieve 857 rev/min?

A child is sitting a distance 8 m from the center of a merry-go-round that is 18.6 m in diameter. If the merry-go-round makes 8.8 rev/min, what is the velocity of the child in m/s?

An object is in circulation motion at a speed of 499 rad/sec when it begins to slow down at a constant rate of 2.6 radians per square second. How many rotations will the object make over the next 5.9 seconds? (Make sure your answer is the number of rotations.)

Starting from rest, the same torque is applied to a solid sphere and a hollow sphere. Both spheres have the same size and mass, and both are rotating about their centers. After some time has elapsed, which sphere will be rotating faster? -hollow sphere -solid sphere -They will be rotating equally fast

A certain front-loading washing machine has a drum of diameter 22.6 inches. A small tennis ball placed inside spins in a vertical circle pressed against the inner wall of the drum. How quickly would the drum have to spin (in radians per second) in order to ensure that the tennis ball remained pinned against the wall for the entire cycle without falling off?

Imagine an arm lifting a barbell. The total mass of the barbell is 2.9 kg. The distance between the man's elbow and hand is 49 cm. The distance between the man's elbow and shoulder is 53 cm. The angle between his forearm and the horizontal (labeled "1") is 38 degrees. The angle between his upper arm and the horizontal (labeled "2") is 12 degrees. Calculate the torque exerted by the barbell's weight about his elbow.

Answer 1